UDP 实现 OMRON 的读写
生成读OMRON数据命令方法：
///
/// 生成读取命令
///
/// plc节点号
/// 本机节点号
/// 读的地址的 数据区 例如：D600
/// 读取的 数据的个数 15 表示 D600-D615
/// 读取的地址 plc D区:0x82 plc H区:0xB2
/// 生成的命令
public static byte[] CmdOmlonReadData(byte byPlcDot, byte byLocalDot, int index, int WordNumber, OMLONADDRESS addressType)
{
byte[] cmdData = new byte[32];
cmdData[0] = 0x80;
cmdData[1] = 0x00;
cmdData[2] = 0x02;
cmdData[3] = 0x00; //PLC网络号
cmdData[4] = byPlcDot; //PLC节点号
cmdData[5] = 0x00; //PLC单元号
cmdData[6] = 0x00; //上位机网络号
cmdData[7] = byLocalDot; //上位机节点号
cmdData[8] = 0x00;
cmdData[9] = 0x03; //SID
cmdData[10] = 0x01; //读命令
cmdData[11] = 0x01; //读命令
cmdData[12] = (byte)addressType;
cmdData[13] = (byte)(index / 256); //起始地址
cmdData[14] = (byte)(index % 256); //起始地址
cmdData[15] = 0x00;
cmdData[16] = (byte)(WordNumber / 256); //读取字数
cmdData[17] = (byte)(WordNumber % 256); //读取字数
return cmdData;
}
写OMRON数据：
///
/// 写OMLON PLC地址数据
///
/// 生成的命令
/// plc 节点
/// 本机 节点
/// 地址的 数据区 例如：D600
/// 个数
/// 需要写入的数据
/// 地址 plc D区:0x82 plc H区:0xB2
/// UDP 发送请求
private Queue sendDataList = new Queue(); //发送数据缓冲区
public void SendData()
{
try
{
udpSend.Connect(remoteEP);
}
catch
{
MessageBox.Show("连接错误 " + remoteEP.ToString(), "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
connectSuccess = true;
byte[] writeValue = new byte[16];
Byte[] sendBytes = { 1, 1 };
while (true)
{
if (cts.Token.IsCancellationRequested)
{
break;
}
bool sendBuffer = false;
// 上锁线程安全
lock (sendDataLock)
{
if (sendDataList.Count > 0) //如果队列里面有需要发送的数据 则发送
{
UdpData getData = sendDataList.Dequeue();
sendBuffer = true;
udpSend.BeginSend(getData.buffer, getData.length, new AsyncCallback(SendCallback), udpSendState);
}
}
if (sendBuffer == false) // 发送读取的命令
{
udpSend.BeginSend(readAgvPlcCommand, 18, readCallback, udpSendState);
ReceiveMessages();
}
if (sendBuffer == false)
Thread.Sleep(4000);
else
Thread.Sleep(100);
}
}
public void addSendBuffer(ReadWriteType readWriteType, byte[] data)
{
UdpData pData = new UdpData();
if (readWriteType == ReadWriteType.WRITE_AGV_D600)
{
pData.length = CmdOmlonWriteData(pData.buffer, byPlcDot, localDot, 601, 1, data, OMLONADDRESS.D);
}
Console.WriteLine(pData.buffer);
//Queue 不是线程安全的
lock (sendDataLock)
{
sendDataList.Enqueue(pData);
}
}
// 发送回调函数
public void SendCallback(IAsyncResult iar)
{
UdpState udpState = iar.AsyncState as UdpState;
if (iar.IsCompleted)
{
udpState.udpClient.EndSend(iar);
}
}
// 接收函数
public void ReceiveMessages()
{
lock (this)
{
try
{
udpSend.BeginReceive(receiveCallback, udpReceiveState);
}
catch (SocketException e)
{
string strException = string.Format("SocketException:{0}", e);
}
Thread.Sleep(100);
}
}
//读数据接收回调函数
public void ReceiveCallback(IAsyncResult iar)
{
UdpState udpState = iar.AsyncState as UdpState;
if (iar.IsCompleted)
{
Byte[] receiveBytes = udpState.udpClient.EndReceive(iar, ref udpReceiveState.ipEndPoint);
if (receiveBytes.Length >= 44) // 读数据返回
{
DataForm mainform = g_em as DataForm;
if (bUpdateFirst == true)
{
mi = new MyInvoke(UpdateForm);
bUpdateFirst = false;
}
if (mainform.InvokeRequired)
{
mainform.BeginInvoke(mi, receiveBytes);
//mainform.BeginInvoke((MethodInvoker)(() =>
//{
// string strData = "";
// DataForm mainForm = g_em as DataForm;
// strData = "";
// for (int n = 0; n < receiveBytes.Length; n++)
// strData = strData + " " + (receiveBytes[n]).ToString("X2");
// mainForm.lstData.Items.Insert(0, strData);
// strData = DateTime.Now.ToString("HH:mm:ss ");
// mainForm.lstData.Items.Insert(0, strData);
// Console.WriteLine(strData);
//}));
}
Console.WriteLine();
}
else if (receiveBytes.Length >= 10) // 写数据返回
{
readWriteType = ReadWriteType.READ_AGV_PLC; ////恢复为读命令
}
}
}
UdpData 于 UdpState
public class UdpState
{
public UdpClient udpClient = null;
public IPEndPoint ipEndPoint = null;
public const int BufferSize = 1024;
public byte[] buffer = new byte[BufferSize];
public int counter = 0;
}
public class UdpData
{
public byte[] buffer = new byte[1024];
public int recvValue = 0;
public int length = 0;
}